Publications by authors named "Chang Soo Ryu"

Objectives: MicroRNAs (miRNAs) are pivotal in post-transcriptionally modulating gene expression in both animals and plants. This study investigates the relationship between microRNA polymorphisms and the occurrence of primary ovarian insufficiency in Korean women. Our hypothesis posits that polymorphisms in microRNAs-specifically miR-10aA > T, miR-30cA > G, miR-181aT > C, and miR-499bA > G-may be linked to primary ovarian insufficiency, influencing the risk of developing the condition.

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  • Coronary artery disease (CAD) is common and can cause heart attacks due to plaque buildup in coronary arteries, with genetic factors playing a role.
  • This study focused on miRNA polymorphisms in the Korean population, identifying that a specific mutation (rs928508 A > G) significantly increases CAD risk.
  • The research highlights the combined effects of genetic variants and conditions like metabolic syndrome and diabetes in enhancing CAD susceptibility, suggesting these findings could aid in developing prognostic biomarkers.
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  • Primary ovarian insufficiency (POI) is a condition causing menstrual disturbances and ovarian dysfunction in women before age 40, with a prevalence of less than 1% that may vary based on ethnicity.
  • The study investigated specific genetic polymorphisms in the follicle-stimulating hormone receptor (FSHR), estrogen receptor 1 (ESR1), and their relation to ovarian health in 139 Korean patients with POI compared to 350 controls.
  • Significant associations were found between certain genotype combinations and the risk of POI, particularly involving FSHR and ESR1, which could point to genetic factors influencing the condition's prevalence and enhance understanding for potential treatments.
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  • Primary ovarian insufficiency (POI) is a major cause of female infertility occurring before age 40, associated with TGF-β/BMP signaling pathway genes like TGF-β and BMP15.
  • The study aimed to explore the link between specific gene polymorphisms in this pathway and the risk of developing POI, examining data from 139 patients with POI and 345 controls.
  • Results indicated that certain allele combinations in TGFBR1 and TGFBR3 genes were linked to a reduced risk of POI, suggesting these polymorphisms could serve as potential biomarkers for diagnosing and treating the condition.
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Idiopathic recurrent pregnancy loss (RPL) is defined as at least two pregnancy losses before 20 weeks of gestation. Approximately 5% of pregnant couples experience idiopathic RPL, which is a heterogeneous disease with various causes including hormonal, chromosomal, and intrauterine abnormalities. Although how pregnancy loss occurs is still unknown, numerous biological factors are associated with the incidence of pregnancy loss, including genetic variants.

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Coronary artery disease (CAD) is a prevalent cardiovascular condition characterized by the accumulation of plaque within coronary arteries. While distinct features of CAD have been reported, the association between genetic factors and CAD in terms of biomarkers was insufficient. This study aimed to investigate the connection between genetic factors and CAD, focusing on the thymidylate synthase () gene, a gene involved in DNA synthesis and one-carbon metabolism.

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  • * A study involving 420 controls and 464 CRC patients found that the MUC4 rs1104760 A>G polymorphism may protect against CRC, while the rs2688513 A>G polymorphism is linked to higher mortality rates in CRC patients.
  • * The research highlights MUC4 rs1104760 as a potential biomarker for CRC, especially in patients with low-density lipoprotein cholesterol (LDL-C) levels, indicating a relationship between genetic factors and CRC prevention.
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Recurrent implantation failure (RIF) refers to two or more unsuccessful in vitro fertilization embryo transfers in the same individual. Embryonic characteristics, immunological factors, and coagulation factors are known to be the causes of RIF. Genetic factors have also been reported to be involved in the occurrence of RIF, and some single nucleotide polymorphisms (SNPs) may contribute to RIF.

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Background: Polymorphisms of endothelial nitric oxide synthases (eNOS) have been associated with cancer susceptibility. Also, metabolic syndrome is associated with cancer malignancy. However, the effect of eNOS polymorphisms and metabolic syndrome on colorectal cancer (CRC) prognosis remains unclear.

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Colorectal cancer (CRC) is the third most common type of cancer and the second leading cause of cancer-related mortality in Western countries. Polymorphisms in one-carbon metabolism and angiogenesis-related genes have been shown to play important roles in tumor development, progression, and metastasis for many cancers, including CRC. Moreover, recent studies have reported that polymorphisms in specific microRNA (miRNA)-binding regions, which are located in the 3'-untranslated region (UTR) of miRNA-regulated genes, are present in a variety of cancers.

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Background: Large artery disease (LAD), cardioembolism (CE), and small vessel disease (SVD) are well-established causes of ischemic stroke. Although a founder variant of RNF213 has been regarded a genetic susceptibility for Moyamoya disease (MMD) and certain types of intracranial atherosclerotic stenosis (ICAS), correlations between RNF213 variants and ischemic stroke with SVD remain largely unknown.

Objectives: This study aimed to characterize the associations of four RNF213 polymorphisms (4448G>A, 4810G>A, 4863G>A, and 4950G>A) with ischemic stroke subtypes in Koreans.

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The most common type of cardiovascular disease is coronary artery disease (CAD), in which a plaque builds up inside the coronary arteries that can lead to a complete blockage of blood flow to the heart, resulting in a heart attack. The CAD may be affected by various factors including age, gender, and lipoprotein disposition as well as genetic factors and metabolic syndrome. In this study, we investigated whether three polymorphisms (-844 G>A, -675 4G>5G, and +43 G>A) and CAD-related clinical parameters are associated with CAD susceptibility.

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  • A recent study explored how specific miRNA polymorphisms may impact the risk and mortality of ischemic stroke in patients.
  • Blood samples from 530 ischemic stroke patients and 403 controls were analyzed, revealing significant associations between certain genetic variants (like rs12894467 and rs3809783) and increased stroke risk and mortality rates.
  • This research is the first to link miRNA polymorphisms to ischemic stroke in the Korean population, potentially aiding in developing prognostic biomarkers for the condition.
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  • Ischemic stroke is influenced by both genetic and environmental factors, with recent studies using whole-exome sequencing to identify novel variants linked to the disease.
  • Researchers analyzed specific genes, like N-methylpurine DNA glycosylase and nitrogen permease regulator-like 3, in a sample of 519 ischemic stroke patients and 417 controls.
  • They discovered significant associations between certain genetic polymorphisms and ischemic stroke, suggesting these variants could serve as clinical biomarkers for the disease's development and patient prognosis.
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Background: Premature ovarian failure (POF) is a highly heterogeneous disorder that occurs in 1% of women of reproductive age. Very few causative genes and variants contributing to POF have been detected, and the disease remains incompletely understood. In this study, we used whole exome sequencing (WES) to identify potential causal variants leading to POF.

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The aim of this study was to identify novel genetic markers related to coronary artery disease (CAD) using a whole-exome sequencing (WES) approach and determine any associations between the selected gene polymorphisms and CAD prevalence. CUBN, HNF1A and LIPC gene polymorphisms related to CAD susceptibility were identified using WES screening. Possible associations between the five gene polymorphisms and CAD susceptibility were examined in 452 CAD patients and 421 control subjects.

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This paper investigates whether glycoprotein 6 () gene polymorphisms are a risk factor for recurrent pregnancy loss (RPL) in Korean women. Genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism and real-time polymerase chain reaction amplification. We identified five polymorphisms in the gene: rs1654410 T>C, rs1671153 T>G, rs1654419 G>A, rs12610286 A>G, and rs1654431 G>A.

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The present study aimed to investigate the potential association of five miRNA machinery gene polymorphisms ( rs3742330A>G, rs10719T>C, rs14035C>T, rs11077A>C and rs417309G>A) with recurrent implantation failure (RIF), a clinical condition in which good-quality embryos repeatedly fail to implant following two or more fertilization cycles, and its associated risk factors in Korean women. Therefore, the present study performed genotype analysis and assessed the frequency of these miRNA gene polymorphisms in patients diagnosed with RIF (n=119) and randomly selected controls (n=210) with at least one live birth and no history of pregnancy loss. The rs10719T>C and rs14035C>T polymorphisms were identified to be significantly associated with decreased prevalence of RIF.

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Recurrent pregnancy loss (RPL), which is defined as two pregnancy losses that occur before 20 weeks of gestation, is relatively common, occurring in approximately 1-5% of women. The underlying cause is often unclear, although numerous factors may contribute to RPL, including environmental and immunological factors, blood coagulation disorders, and genetics. In particular, single nucleotide variants have been associated with RPL, including those found in microRNAs (miRNAs).

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Intracranial major artery stenosis/occlusion (ICASO) is the major cause of ischemic stroke. Recent studies have suggested that variants of , a susceptibility gene for moyamoya disease (MMD), are also related to non-MMD ICASO. Regarding the predominant involvement of steno-occlusion on anterior circulation in MMD, we hypothesized that the ICASO distribution pattern (anterior/posterior) in non-MMD may differ according to variants.

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In colorectal carcinogenesis, the unique molecular and genetic changes that occur within cells result in specific CRC phenotypes. The involvement of the long non-coding RNA, , in cancer development, progression, and metastasis is well-established. Various studies have reported on the contribution of to cancer pathogenesis.

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Recurrent pregnancy loss (RPL) is defined as two or more consecutive pregnancy losses prior to 20 weeks of gestation, and the incidence of RPL is estimated at 1% of all pregnancies. While the etiologies of RPL are diverse, immune function is considered to be an important cause of RPL. In particular, the complement system is essential for stable development of the placenta and fetus.

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Background: Recurrent implantation failure (RIF) is the failure of embryos to implant more than two times in a given individual. There is debate about a precise definition for RIF, but we consider more than two implantation failures for individuals who undergo in vitro fertilization-embryo transfer (IVF-ET) to constitute RIF. There are many potential reasons for RIF, including embryonic factors, immunological factors, uterine factors, coagulate factors, and genetic factors.

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Recurrent implantation failure (RIF) is a common reproductive clinical condition treated by fertility specialists at in vitro fertilization (IVF) clinics. Several factors affect embryo implantation including the age of the female, the quality of embryos and the sperm, genetics, immunologic factors. Here, we investigated the association of Argonaute 1 (AGO1) and Argonaute 2 (AGO2) polymorphisms and RIF.

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